There are total 18 hours or 1080 minutes from 7am to 1am. In words, this duration is equal to eighteen hours or one thousand eighty minutes.
How many hours from
| 8AM to 10AM | 9AM to 11AM | 6PM to 1PM |
| 11PM to 7AM | 2PM to 11PM | 11AM to 3AM |
| 1PM to 2PM | 12PM to 8PM | 9AM to 10AM |
| 2AM to 1PM | 1PM to 1AM | 12AM to 7AM |
| 9AM to 11AM | 8AM to 12PM | 9PM to 7AM |
| 4AM to 9AM | 7AM to 3PM | 11PM to 4AM |
